/* Hello, Emacs, this is -*-C-*- */

/*------------------------------
	GNUPLOT - pdf.trm

	This file is included by ../term.c.

	This driver uses PDFlib from www.pdflib.com

	Author:

		Hans-Bernhard Br"oker
		broeker@physik.rwth-aachen.de

	Licence: see the gnuplot copyright (to be merged into here...)

	Options: can #define PDF_DONT_COMPRESS to avoid PDF output
	generated being compressed (by the 'deflate' algorithm as used
	in 'zip' or 'gzip'). That helps in debugging.

------------------------------*/

/* CODEME: Add patterned lines (?). */

/* PM3D support by Johannes Zellner <johannes@zellner.org>, May-15-2002 */
/* set_color fixes by Petr Mikulik <mikulik@physics.muni.cz>, June-10-2002 */
/* image support by Ethan A Merritt <merritt@u.washington.edu>, March 2003 */

/* Text rotation 24-Jul-2002 Ethan A Merritt <merritt@u.washington.edu> */
/* Revised fill patterns 02-Apr-2003 Ethan A Merritt */
/* Enhanced text mode support November 2003 Ethan A Merritt */

#include "driver.h"

#ifdef TERM_REGISTER
register_term(pdf)
#endif

#ifdef TERM_PROTO
TERM_PUBLIC void PDF_options(void);
TERM_PUBLIC void PDF_init(void);
TERM_PUBLIC void PDF_graphics(void);
TERM_PUBLIC void PDF_text(void);
TERM_PUBLIC void PDF_linetype(int linetype);
TERM_PUBLIC void PDF_move(unsigned int x, unsigned int y);
TERM_PUBLIC void PDF_vector(unsigned int x, unsigned int y);
TERM_PUBLIC void PDF_put_text(unsigned int x, unsigned int y, const char *str);
TERM_PUBLIC void PDF_reset(void);
TERM_PUBLIC int PDF_justify_text(enum JUSTIFY mode);
TERM_PUBLIC int PDF_text_angle(int ang);
TERM_PUBLIC void PDF_point(unsigned int x, unsigned int y, int pointstyle);
TERM_PUBLIC int PDF_set_font(const char *font);
TERM_PUBLIC void PDF_boxfill(int style, unsigned int x1, unsigned int y1, unsigned int width, unsigned int height);
TERM_PUBLIC void PDF_linewidth(double linewidth);
TERM_PUBLIC int PDF_make_palette(t_sm_palette *);
TERM_PUBLIC void PDF_previous_palette(void);
TERM_PUBLIC void PDF_set_color(t_colorspec *);
TERM_PUBLIC void PDF_image(unsigned int, unsigned int, coordval *, gpiPoint *, t_imagecolor);

TERM_PUBLIC void PDF_filled_polygon(int, gpiPoint *);

/* To support "set term png enhanced" */
TERM_PUBLIC void ENHPDF_put_text(unsigned int x, unsigned int y, const char *str);
TERM_PUBLIC void ENHPDF_OPEN(char * fontname, double fontsize,
			double base, TBOOLEAN widthflag, TBOOLEAN showflag,
			int overprint);
TERM_PUBLIC void ENHPDF_FLUSH(void);

#define PDF_NUM_POINTTYPES 75	/* number of point symbol types not counting the dot */

#define PDF_RESOLUTION  (20)	/* number of terminal pixels per pt */
#define PDF_XMAX	(5*72*PDF_RESOLUTION) /* 5 inches, 72 pt/inch */
#define PDF_YMAX	(3*72*PDF_RESOLUTION) /* 3 inches, 72 pt/inch */

static TBOOLEAN pdf_explicit_size = FALSE;
static size_units pdf_explicit_units = INCHES;

#endif /* TERM_PROTO */

#ifndef TERM_PROTO_ONLY
#ifdef TERM_BODY

#include <pdflib.h>

static PDF *myPDF = NULL;

static unsigned int PDF_xLast = UINT_MAX; /* current pen horizontal position*/
static unsigned int PDF_yLast = UINT_MAX; /* current pen vertical position*/

static int PDF_LineType = LT_UNDEFINED;		/* current line type*/
static int PDF_LineCap = 0;			/* Butt ends */
static double PDF_LineWidth = 1.0;		/* current line width*/
static int PDF_TextAngle = 0;			/* current text orientation*/
static enum JUSTIFY PDF_TextJust = LEFT;	/* current text justification*/
static double PDF_linewidth_factor = 1.0;	/* multiplier for line width */
static double PDF_dashlength_factor = 1.0;	/* multiplier for dash length */
static TBOOLEAN PDF_monochrome = FALSE;		/* default all linetypes to black */
static rgb_color PDF_current_rgb = {0.,0.,0.};	/* Last color set */
static double PDF_current_gray = 0.0;		/* Last color set (mono version) */

#ifdef HAVE_NODASH_LIBPDF
static TBOOLEAN PDF_dashedlines = FALSE;	/* solid or dashed? */
#else
static TBOOLEAN PDF_dashedlines = TRUE;		/* solid or dashed? */
#endif

/* default text font family: */
static char PDF_fontNameDef[MAX_ID_LEN + 1] = "Helvetica";
static double PDF_fontSizeDef = 6;	/* default text size*/
/* current text font family: */
static char PDF_fontNameCur[MAX_ID_LEN + 1] = "Helvetica";
static double PDF_fontSizeCur = 6; /* current text size*/
static double PDF_fontscale = 1.0;

static TBOOLEAN PDF_pageIsOpen = FALSE; /* already started a page ?? */
static TBOOLEAN PDF_pathIsOpen = FALSE; /* open path flag*/

static int PDF_fontAscent = 0;	/* estimated current font ascent*/
static int PDF_fontDescent = 0;	/* estimated current font descent*/
static int PDF_fontLeading = 0;	/* estimated current font leading*/
static int PDF_fontAvWidth = 0;	/* estimated current font char average width*/
static int PDF_currentFontHandle; /* Needed for exhanced text mode */

static short PDF_Pen_RealID(int);
static void PDF_PathOpen(void);
static void PDF_PathClose(void);
static void PDF_SetFont(void);
static void PDF_DefinePatterns(void);
enum { PDF_patterns = 7 };
static int PDF_patternHandles[PDF_patterns];

#ifndef HAVE_NODASH_LIBPDF
/* Description of dash patterns (same as those in post.trm) */
static int dash1[] = {8, 8};
static int dash2[] = {4, 6};
static int dash3[] = {2, 3};
static int dash4[] = {12, 4, 2, 4};
static int dash5[] = {6, 6, 2, 6};
static int dash6[] = {4, 4, 4, 12};
static int dash7[] = {1, 4, 12, 4, 1, 4};
#endif

/*------------------------ helper functions -------------------*/

static short
PDF_Pen_RealID (int inPenCode)
{
    if (inPenCode >= 12)
	inPenCode %= 12;	/* normalize pen code*/
    if (inPenCode <= LT_NODRAW)
	inPenCode = LT_NODRAW;

    return (inPenCode + 2);
}

/* Functions to ensure that as many move() and vector() calls as
 * possible get converted into a single long 'path', before closing it
 * with a stroke or similar command. */
static void
PDF_PathOpen ()
{
    PDF_pathIsOpen = TRUE;
}

static void
PDF_PathClose ()
{
    if (PDF_pathIsOpen) {
	PDF_stroke(myPDF);

	PDF_pathIsOpen = FALSE;
    }
}

/* Helper function to deal with switching over to a newly selected font.
 * For now, this does not try to embed fonts into the PDF file.
 * We would like to allow UTF-8 fonts via
	font_handle = PDF_findfont(myPDF, PDF_fontNameCur, "unicode", 0);
 * but this is not supported by the free-as-in-beer PDFlib Lite.
 */
static void
PDF_SetFont ()
{
    int font_handle;
    const char *pdfenc = "host";

    /* Allow graceful failure */
    PDF_set_parameter(myPDF, "fontwarning", "false");

    /* LCB : Symbol and ZapfDingbats should use "builtin" encoding */
    if ( (strcmp(PDF_fontNameCur,"Symbol") == 0) ||
	 (strcmp(PDF_fontNameCur,"ZapfDingbats") == 0) ) {
	pdfenc = "builtin";
    } else if (encoding == S_ENC_ISO8859_1) {
        pdfenc = "iso8859-1";
    } else if (encoding == S_ENC_ISO8859_2) {
        pdfenc = "iso8859-2";
    } else if (encoding == S_ENC_ISO8859_9) {
        pdfenc = "iso8859-9";
    } else if (encoding == S_ENC_ISO8859_15) {
        pdfenc = "iso8859-15";
    } else if (encoding == S_ENC_CP1250) {
        pdfenc = "cp1250";
    } else if (encoding == S_ENC_CP1252) {
        pdfenc = "cp1252";
    }
        
    font_handle = PDF_findfont(myPDF, PDF_fontNameCur, pdfenc, 0);
    
    if (font_handle == -1 && strcmp(pdfenc, "host")) {
        fprintf(stderr,"Couldn't find font %s in encoding %s, trying \"host\"\n", 
	        PDF_fontNameCur, pdfenc);
	font_handle = PDF_findfont(myPDF, PDF_fontNameCur, "host", 0);
    }

    if (font_handle == -1) {
	font_handle = PDF_findfont(myPDF, "Times-Roman", "host", 0);
	fprintf(stderr,"Couldn't find font %s, falling back to Times-Roman\n", PDF_fontNameCur);
    }

    PDF_setfont(myPDF, font_handle, PDF_fontSizeCur * PDF_RESOLUTION * PDF_fontscale);

    /* Ask PDFlib for the actual numbers */
    PDF_fontAscent = (int) (PDF_RESOLUTION * PDF_fontSizeCur * PDF_fontscale * PDF_get_value(myPDF, "ascender", 0));
    PDF_fontDescent = (int) (- PDF_RESOLUTION * PDF_fontSizeCur * PDF_fontscale * PDF_get_value(myPDF, "descender", 0));
    PDF_fontLeading = (int) (PDF_RESOLUTION * PDF_fontSizeCur * PDF_fontscale * 0.25);

    /* Assume this particular string is a somewhat reasonable typical
     * output, for getting at the average character width */
    PDF_fontAvWidth = (int)
	(PDF_RESOLUTION * PDF_stringwidth(myPDF, "01234567890123456789",
					  font_handle, PDF_fontSizeCur * PDF_fontscale )
	 / 20.0);
    PDF_currentFontHandle = font_handle;

}

#if !HAVE_OLD_LIBPDF
static void
PDF_DefinePatterns()
{
    int i;

    /* EAM April 2003 - Rearrange patterns to maximize contrast in mono.
     * Because of the finite linewidth, each pattern must include line
     * fragments at the "empty" corners.
     */
    for (i=0; i<PDF_patterns; i++) {
	PDF_patternHandles[i] = PDF_begin_pattern(myPDF, 8, 8, 8, 8, 2);
	PDF_setlinewidth(myPDF, 0.25);
	PDF_setlinecap(myPDF, 2); /* square ends */
	switch (i) {
	case 0:	PDF_moveto(myPDF, 0, 8);
		PDF_lineto(myPDF, 8, 0);
		PDF_moveto(myPDF, 0, 0);
		PDF_lineto(myPDF, 8, 8);
		PDF_stroke(myPDF);
		break;
	case 1:	PDF_moveto(myPDF, 0, 8);
		PDF_lineto(myPDF, 8, 0);
		PDF_moveto(myPDF, 0, 0);
		PDF_lineto(myPDF, 8, 8);
		PDF_moveto(myPDF, 4, 0);
		PDF_lineto(myPDF, 8, 4);
		PDF_lineto(myPDF, 4, 8);
		PDF_lineto(myPDF, 0, 4);
		PDF_lineto(myPDF, 4, 0);
		PDF_stroke(myPDF);
		break;
	case 2:	PDF_moveto(myPDF, 0, 0);
		PDF_lineto(myPDF, 0, 8);
		PDF_lineto(myPDF, 8, 8);
		PDF_lineto(myPDF, 8, 0);
		PDF_lineto(myPDF, 0, 0);
		PDF_fill(myPDF);
		break;
	case 3:	PDF_moveto(myPDF, 0, 4);
		PDF_lineto(myPDF, 4, 0);
		PDF_moveto(myPDF, 4, 8);
		PDF_lineto(myPDF, 8, 4);
		PDF_stroke(myPDF);
		break;
	case 4:	PDF_moveto(myPDF, 0, 4);
		PDF_lineto(myPDF, 4, 8);
		PDF_moveto(myPDF, 4, 0);
		PDF_lineto(myPDF, 8, 4);
		PDF_stroke(myPDF);
		break;
	case 5:	PDF_moveto(myPDF, 0, 4);
		PDF_lineto(myPDF, 2, 0);
		PDF_moveto(myPDF, 2, 8);
		PDF_lineto(myPDF, 6, 0);
		PDF_moveto(myPDF, 6, 8);
		PDF_lineto(myPDF, 8, 4);
		PDF_stroke(myPDF);
		break;
	case 6:	PDF_moveto(myPDF, 0, 4);
		PDF_lineto(myPDF, 2, 8);
		PDF_moveto(myPDF, 2, 0);
		PDF_lineto(myPDF, 6, 8);
		PDF_moveto(myPDF, 6, 0);
		PDF_lineto(myPDF, 8, 4);
		PDF_stroke(myPDF);
		break;
	case 7:	/* not used */
		PDF_moveto(myPDF, 4, 0);
		PDF_lineto(myPDF, 0, 2);
		PDF_moveto(myPDF, 8, 2);
		PDF_lineto(myPDF, 0, 6);
		PDF_moveto(myPDF, 8, 6);
		PDF_lineto(myPDF, 4, 8);
		PDF_stroke(myPDF);
		break;
	case 8:	/* not used */
		PDF_moveto(myPDF, 4, 0);
		PDF_lineto(myPDF, 8, 2);
		PDF_moveto(myPDF, 0, 2);
		PDF_lineto(myPDF, 8, 6);
		PDF_moveto(myPDF, 0, 6);
		PDF_lineto(myPDF, 4, 8);
		PDF_stroke(myPDF);
		break;
	}
	PDF_end_pattern(myPDF);
    }
}
#endif

/*------------------- the terminal entry functions --------------------*/


TERM_PUBLIC void
PDF_options ()
{
    /* Annoying hack to handle the case of 'set termoption' after */
    /* we have already initialized the terminal.                  */
    if (!almost_equals(c_token-1, "termopt$ion")) {
	pdf_explicit_size = FALSE;
	/* Default to enhanced text */
	term->put_text = ENHPDF_put_text;
	term->flags |= TERM_ENHANCED_TEXT;
    }

    while (!END_OF_COMMAND) {

	if (almost_equals(c_token, "enh$anced")) {
	    c_token++;
	    term->put_text = ENHPDF_put_text;
	    term->flags |= TERM_ENHANCED_TEXT;
	    continue;
	} else if (almost_equals(c_token, "noenh$anced")) {
	    c_token++;
	    term->put_text = PDF_put_text;
	    term->flags &= ~TERM_ENHANCED_TEXT;
	    continue;
	}

	if (almost_equals(c_token, "fn$ame") || almost_equals(c_token, "font"))  {
	    char *s, *comma;
	    c_token++;

	    if (!(s = try_to_get_string()))
		int_error(c_token,"fname: expecting font name");
	    comma = strrchr(s,',');
	    if (comma && (1 == sscanf(comma+1,"%lf",&PDF_fontSizeDef)))
		*comma = '\0';
	    if (*s)
		strncpy(PDF_fontNameDef, s, sizeof(PDF_fontNameDef));
	    free(s);
	    continue;
	}

	if (almost_equals(c_token, "fs$ize")) {
	    c_token++;

	    if (END_OF_COMMAND)
		int_error(c_token,"fsize: expecting font size");
	    PDF_fontSizeDef = real_expression();
	    continue;
	}

	if (equals(c_token, "lw") || almost_equals(c_token, "linew$idth")) {
	    c_token++;

	    if (END_OF_COMMAND)
		int_error(c_token, "expecting line width");
	    PDF_linewidth_factor = real_expression();
	    if (PDF_linewidth_factor <= 0)
		PDF_linewidth_factor = 0.1;
	    continue;
	}

	if (almost_equals(c_token, "rou$nded")) {
	    c_token++;
	    PDF_LineCap = 1;
	    continue;
	}

	if (equals(c_token, "butt")) {
	    PDF_LineCap = 0;
	    continue;
	}

	if (equals(c_token, "color") || almost_equals(c_token, "col$our")) {
	    c_token++;
	    PDF_monochrome = FALSE;
	    term->flags &= ~TERM_MONOCHROME;
	    continue;
	}   

	if (almost_equals(c_token, "mono$chrome")) {
	    c_token++;
	    PDF_monochrome = TRUE;
	    term->flags |= TERM_MONOCHROME;
	    continue;
	}   

	if (equals(c_token, "dl") || almost_equals(c_token, "dashl$ength")) {
	    c_token++;
	    if (END_OF_COMMAND)
		int_error(c_token, "expecting dashlength multiplier");
	    PDF_dashlength_factor = real_expression();
	    if (PDF_dashlength_factor < 0.0)
		PDF_dashlength_factor = 1.0;
	    continue;
	}

	if (almost_equals(c_token, "dash$ed") || equals(c_token, "solid")) {
	    /* Version 5 always enables dashed lines */
	    c_token++;
	    continue;
	}

	if (equals(c_token, "size")) {
	    float xmax_t, ymax_t;
	    c_token++;
	    pdf_explicit_size = TRUE;
	    pdf_explicit_units = parse_term_size(&xmax_t, &ymax_t, INCHES);
	    term->xmax = xmax_t*PDF_RESOLUTION*72./gp_resolution;
	    term->ymax = ymax_t*PDF_RESOLUTION*72./gp_resolution;
	    continue;
	}

	if (equals(c_token, "fontscale")) {
	    c_token++;
	    PDF_fontscale = END_OF_COMMAND ? -1 : real_expression();
	    if (PDF_fontscale < 0)
		PDF_fontscale = 1.0;
	    continue;
	}

	int_error(c_token, "unexpected text at end of command");
    }

    /* Save options back into options string in normalized format */
    sprintf(term_options, "%s%s fname '%s'  fsize %g fontscale %3.1f linewidth %3.1f %s ",
	    PDF_monochrome ? "monochrome " : " ",
	    term->put_text == ENHPDF_put_text ? "enhanced" : "noenhanced",
	    PDF_fontNameDef, PDF_fontSizeDef, PDF_fontscale, PDF_linewidth_factor,
	    PDF_LineCap == 1 ? "rounded" : "");
    if (PDF_dashedlines)
	sprintf(&(term_options[strlen(term_options)]), "dl %3.1f",
		PDF_dashlength_factor);
    if (pdf_explicit_size) {
	if (pdf_explicit_units == CM)
	    sprintf(&(term_options[strlen(term_options)]), "size %.2fcm, %.2fcm ", 
		2.54*(float)term->xmax/(72.*PDF_RESOLUTION),
		2.54*(float)term->ymax/(72.*PDF_RESOLUTION));
	else
	    sprintf(&(term_options[strlen(term_options)]), "size %.2fin, %.2fin ", 
		(float)term->xmax/(72.*PDF_RESOLUTION),
		(float)term->ymax/(72.*PDF_RESOLUTION));
    }
}


TERM_PUBLIC void
PDF_init ()
{
    static TBOOLEAN PDFlib_booted = FALSE;
    char *gpversionstring;
    char *username;
    char *timedate;
    time_t now;

    if (!PDFlib_booted) {
	PDF_boot();
	PDFlib_booted = TRUE;
    }

    if (!myPDF)
	myPDF = PDF_new();

    /*open new PDF file */
#ifdef HAVE_LIBPDF_OPEN_FILE
    if (PDF_open_file(myPDF, outstr) == -1)
#else
    if (PDF_begin_document(myPDF, outstr?outstr:"-", 0,
			   "compatibility=1.4") == -1)
#endif /* HAVE_LIBPDF_OPEN_FILE */
	int_error(NO_CARET, "Error:cannot open PDF file .\n");

#ifdef PDF_DONT_COMPRESS
    /* for easier debugging of the output, turn off PDF stream
     * compression */
    PDF_set_value(myPDF, "compress", 0);
#endif

    gpversionstring = gp_alloc(20 + strlen(gnuplot_version) + 
			       strlen(gnuplot_patchlevel) + 1, "PDF_init");
    sprintf(gpversionstring,"gnuplot %s patchlevel %s",
	    gnuplot_version, gnuplot_patchlevel);

    time(&now);
    timedate=asctime(localtime(&now));
    timedate[strlen(timedate)-1]='\0';

    PDF_set_info(myPDF,"Creator",gpversionstring);

    username=getusername();
    if (username) {
	PDF_set_info(myPDF,"Author",username);
	free(username);
    }

    if (outstr)
	PDF_set_info(myPDF,"Title",outstr); /* FIXME: use 'set title', if any? */
    PDF_set_info(myPDF,"Subject","gnuplot plot");

    if (gpversionstring)
	free(gpversionstring);

    PDF_LineType = LT_UNDEFINED;

    /* set current font to default */
    strcpy(PDF_fontNameCur, PDF_fontNameDef);
    PDF_fontSizeCur = PDF_fontSizeDef;

#if !HAVE_OLD_LIBPDF
    PDF_DefinePatterns();
#endif

    /* Have to start the first page now, in order to know the actual
     * size of the selected font */
    PDF_graphics();

    /* set h_char, v_char*/
    term->h_char = PDF_fontAvWidth;
    term->v_char = (PDF_fontAscent + PDF_fontDescent + PDF_fontLeading);

    /* set h_tic, v_tic*/
    term->h_tic = term->v_tic = 3 * PDF_RESOLUTION;

    /* initialize terminal's pointsize from "set pointsize" value */
    term_pointsize = pointsize;

    /* Initialize other default settings */
    PDF_setlinecap(myPDF, PDF_LineCap);
    PDF_setlinejoin(myPDF, PDF_LineCap);	/* round+round or butt+mitre */
}


TERM_PUBLIC void
PDF_graphics ()
{
    if (PDF_pageIsOpen)
	return;			/* already open --> nothing to do */

    PDF_pathIsOpen = FALSE;
    PDF_xLast = PDF_yLast = UINT_MAX;

    /* set size of canvas */
    if (!pdf_explicit_size) {
	term->xmax = PDF_XMAX;
	term->ymax = PDF_YMAX;
    }

    PDF_begin_page(myPDF, (double)term->xmax / PDF_RESOLUTION,
		   (double)term->ymax / PDF_RESOLUTION);
    PDF_scale(myPDF, 1.0/PDF_RESOLUTION, 1.0/PDF_RESOLUTION);
    if (title.text && title.text[0])
	/* a title has been set --> use it as the bookmark name, too */
	PDF_add_bookmark(myPDF, title.text, 0, 1);
    PDF_pageIsOpen = TRUE;

    PDF_SetFont();
}


TERM_PUBLIC void
PDF_text ()
{
    PDF_PathClose();
    PDF_end_page(myPDF);
    PDF_pageIsOpen = FALSE;
}


TERM_PUBLIC void
PDF_reset ()
{
    assert(PDF_pageIsOpen == FALSE);
#ifdef HAVE_LIBPDF_OPEN_FILE
    PDF_close(myPDF);
#else
    PDF_end_document(myPDF, "");
#endif /* HAVE_LIBPDF_OPEN_FILE */
    PDF_delete(myPDF);
    myPDF = NULL;
}


TERM_PUBLIC void
PDF_linetype (int linetype)
{
    int dash = linetype % 8;

    linetype = PDF_Pen_RealID(linetype);
    if (linetype == PDF_LineType)
	return;
	
    PDF_PathClose ();
    PDF_LineType = linetype;

    if (PDF_monochrome) {
	PDF_current_gray = 0.0;
	PDF_setgray(myPDF, PDF_current_gray);
    } else {
	unsigned int irgb = pm3d_color_names_tbl[1+linetype].value;
	PDF_current_rgb.r = (double)((irgb >> 16) & 0xff) / 255.;
	PDF_current_rgb.g = (double)((irgb >>  8) & 0xff) / 255.;
	PDF_current_rgb.b = (double)((irgb      ) & 0xff) / 255.;
	PDF_setrgbcolor(myPDF, PDF_current_rgb.r, PDF_current_rgb.g, PDF_current_rgb.b);
    }

#ifndef HAVE_NODASH_LIBPDF
	if (PDF_dashedlines) {
	    char dashtype[64];
	    float dl = 8.0 * PDF_dashlength_factor;

	    switch (dash) {
	    default:
	    case 0:	PDF_setdash(myPDF, 0.0, 0.0);
			return;
	    case 1:	sprintf(dashtype,"dasharray={%4.1f %4.1f}",
			dl*dash1[0],dl*dash1[1]);
			break;
	    case 2:	sprintf(dashtype,"dasharray={%4.1f %4.1f}",
			dl*dash2[0],dl*dash2[1]);
			break;
	    case 3:	sprintf(dashtype,"dasharray={%4.1f %4.1f}",
			dl*dash3[0],dl*dash3[1]);
			break;
	    case 4:	sprintf(dashtype,"dasharray={%4.1f %4.1f %4.1f %4.1f}",
			dl*dash4[0],dl*dash4[1],dl*dash4[2],dl*dash4[3]);
			break;
	    case 5:	sprintf(dashtype,"dasharray={%4.1f %4.1f %4.1f %4.1f}",
			dl*dash5[0],dl*dash5[1],dl*dash5[2],dl*dash5[3]);
			break;
	    case 6:	sprintf(dashtype,"dasharray={%4.1f %4.1f %4.1f %4.1f}",
			dl*dash6[0],dl*dash6[1],dl*dash6[2],dl*dash6[3]);
			break;
	    case 7:	sprintf(dashtype,"dasharray={%4.1f %4.1f %4.1f %4.1f %4.1f %4.1f}",
			dl*dash7[0],dl*dash7[1],dl*dash7[2],dl*dash7[3],dl*dash7[4],dl*dash7[5]);
			break;
	    }
	    PDF_setdashpattern(myPDF,dashtype);
	}
#endif
	
}


TERM_PUBLIC void
PDF_linewidth (double linewidth)
{
    PDF_PathClose();
    PDF_LineWidth = PDF_RESOLUTION * PDF_linewidth_factor * linewidth / 4.0;
    if (PDF_LineWidth < 0.1)
	PDF_LineWidth = 0.1;
    PDF_setlinewidth(myPDF, PDF_LineWidth);
}


TERM_PUBLIC void
PDF_move (unsigned int x, unsigned int y)
{
    if (PDF_pathIsOpen && x == PDF_xLast && y == PDF_yLast)
	return;

    PDF_PathOpen ();
    PDF_moveto(myPDF, x, y);

    PDF_xLast = x;
    PDF_yLast = y;
}


TERM_PUBLIC void
PDF_vector (unsigned int x, unsigned int y)
{
    if (PDF_pathIsOpen && x == PDF_xLast && y == PDF_yLast)
	return;

    if (!PDF_pathIsOpen) {
	PDF_PathOpen ();
	PDF_moveto(myPDF, PDF_xLast, PDF_yLast);
    }

    PDF_lineto(myPDF, x, y);

    PDF_xLast = x;
    PDF_yLast = y;
}

/* Helper function. Many symbols have an additional dot in their
 * center, so isolate its drawing into a separate function. */
static GP_INLINE void
PDF_dot (unsigned int x, unsigned int y)
{
    /* Imitate PS's way of creating a small dot by a zero-length line
     * segment with rounded endpoints */
    PDF_setlinecap(myPDF, 1); /* rounded ends */
    PDF_moveto(myPDF, x, y);
    PDF_lineto(myPDF, x, y);
    PDF_stroke(myPDF);
    PDF_setlinecap(myPDF, PDF_LineCap); /* restore ends */
}


TERM_PUBLIC void
PDF_point (unsigned int x, unsigned int y, int number)
{
    PDF_PathClose ();
    PDF_save(myPDF);

    if (number < 0 || term_pointsize <= 0) {
	/* Treat all negative point sizes as  dots */
	PDF_dot(x, y);
    } else {
	/* Change coordinate system so the point symbols themselves
	 * can be drawn without depending on position or size (-->
	 * better compression and less coding for gnuplot) */
	/* NB: I use the do_pointsize() default implementation, which
	 * just stores the last set pointsize into `term_pointsize',
	 * to avoid introducing another static driver-local variable
	 * */
	PDF_translate(myPDF, x, y);
	PDF_scale(myPDF, term->h_tic / 2.0 * term_pointsize,
		  term->v_tic / 2.0 * term_pointsize);
	/* Correct linewidth to counter the scaling effect --- assume
	 * h_tic is usable, to avoid having to average h_ and v_tic */
	PDF_setlinewidth(myPDF,
			 PDF_LineWidth / (term->h_tic / 2.0 * term_pointsize));
	switch (number %= PDF_NUM_POINTTYPES) {
	case 0:			/* Plus */
	    PDF_moveto(myPDF, -1, 0);
	    PDF_lineto(myPDF, 1, 0);
	    PDF_moveto(myPDF, 0, -1);
	    PDF_lineto(myPDF, 0, 1);
	    PDF_stroke(myPDF);
	    break;
	case 2:			/* Star */
	    PDF_moveto(myPDF, -1, 0);
	    PDF_lineto(myPDF, 1, 0);
	    PDF_moveto(myPDF, 0, -1);
	    PDF_lineto(myPDF, 0, 1);
	    /* FALLTHROUGH */
	case 1:			/* Cross */
	    PDF_moveto(myPDF, -1, -1);
	    PDF_lineto(myPDF, 1, 1);
	    PDF_moveto(myPDF, 1, -1);
	    PDF_lineto(myPDF, -1, 1);
	    PDF_stroke(myPDF);
	    break;

/* For each x = 0..5, 4 shapes are defined:
 * 3 + 2*x --> hollow symbol with a dot at its center
 * 4 + 2*x --> solid symbol filled in linetype's color
 * 63 + x  --> hollow symbol without the center dot
 * 69 + x  --> symbol filled with white --> opaque symbol */

	case 63+0:		/* BoxEmpty */
	case 3+2*0:		/* Box */
	    PDF_moveto(myPDF, -1, -1);
	    PDF_lineto(myPDF, 1, -1);
	    PDF_lineto(myPDF, 1, 1);
	    PDF_lineto(myPDF, -1, 1);
	    PDF_closepath_stroke(myPDF);
	    if (number == 3) PDF_dot(0,0);
	    break;
	case 69+0:		/* BoxWhitefilled */
	    PDF_setgray_fill(myPDF, 1);
	    /* FALLTHROUGH */
	case 4+2*0:		/* BoxFilled */
	    PDF_moveto(myPDF, -1, -1);
	    PDF_lineto(myPDF, 1, -1);
	    PDF_lineto(myPDF, 1, 1);
	    PDF_lineto(myPDF, -1, 1);
	    PDF_closepath_fill_stroke(myPDF);
	    break;

	case 63+1:		/* CircleEmpty */
	case 3+2*1:		/* Circle */
	    PDF_circle(myPDF, 0, 0, 1);
	    PDF_stroke(myPDF);
	    if (number == 5) PDF_dot(0,0);
	    break;
	case 69+1:		/* CircleWhitefilled */
	    PDF_setgray_fill(myPDF, 1);
	    /* FALLTHROUGH */
	case 4+2*1:		/* CircleFilled */
	    PDF_circle(myPDF, 0, 0, 1);
	    PDF_fill_stroke(myPDF);
	    break;

	case 63+2:		/* TriangleUpEmpty */
	case 3+2*2:		/* TriangleUp */
	    PDF_moveto(myPDF, 0, 1.12);
	    PDF_lineto(myPDF, -1, -0.5);
	    PDF_lineto(myPDF, 1, -0.5);
	    PDF_closepath_stroke(myPDF);
	    if (number == 7) PDF_dot(0,0);
	    break;
	case 69+2:		/* TriangleUpWhitefilled */
	    PDF_setgray_fill(myPDF, 1);
	    /* FALLTHROUGH */
	case 4+2*2:			/* TriangleUpFilled */
	    PDF_moveto(myPDF, 0, 1.12);
	    PDF_lineto(myPDF, -1, -0.5);
	    PDF_lineto(myPDF, 1, -0.5);
	    PDF_closepath_fill_stroke(myPDF);
	    break;

	case 63+3:		/* TriangleDownEmpty */
	case 3+2*3:		/* TriangleDown */
	    PDF_moveto(myPDF, 0, -1.12);
	    PDF_lineto(myPDF, -1, 0.5);
	    PDF_lineto(myPDF, 1, 0.5);
	    PDF_closepath_stroke(myPDF);
	    if (number == 9) PDF_dot(0,0);
	    break;
	case 69+3:		/* TriangleDownWhitefilled */
	    PDF_setgray_fill(myPDF, 1);
	    /* FALLTHROUGH */
	case 4+2*3:		/* TriangleDownFilled */
	    PDF_moveto(myPDF, 0, -1.12);
	    PDF_lineto(myPDF, -1, 0.5);
	    PDF_lineto(myPDF, 1, 0.5);
	    PDF_closepath_fill_stroke(myPDF);
	    break;

	case 63+4:		/* DiamondEmpty */
	case 3+2*4:		/* Diamond */
	    PDF_moveto(myPDF, 0, -1);
	    PDF_lineto(myPDF, 1, 0);
	    PDF_lineto(myPDF, 0, 1);
	    PDF_lineto(myPDF, -1, 0);
	    PDF_closepath_stroke(myPDF);
	    if (number == 11) PDF_dot(0,0);
	    break;
	case 69+4:		/* DiamondWhitefilled */
	    PDF_setgray_fill(myPDF, 1);
	    /* FALLTHROUGH */
	case 4+2*4:		/* DiamondFilled */
	    PDF_moveto(myPDF, 0, -1);
	    PDF_lineto(myPDF, 1, 0);
	    PDF_lineto(myPDF, 0, 1);
	    PDF_lineto(myPDF, -1, 0);
	    PDF_closepath_fill_stroke(myPDF);
	    break;

	case 63+5:		/* PentagonEmpty */
	case 3+2*5:		/* Pentagon */
	    PDF_moveto(myPDF, 0, 1);
	    PDF_lineto(myPDF, -0.95, 0.31);
	    PDF_lineto(myPDF, -0.58, -0.81);
	    PDF_lineto(myPDF, +0.58, -0.81);
	    PDF_lineto(myPDF, +0.95, 0.31);
	    PDF_closepath_stroke(myPDF);
	    if (number == 13) PDF_dot(0,0);
	    break;
	case 69+5:		/* PentagonWhitefilled */
	    PDF_setgray_fill(myPDF, 1);
	    /* FALLTHROUGH */
	case 4+2*5:		/* PentagonFilled */
	    PDF_moveto(myPDF, 0, 1);
	    PDF_lineto(myPDF, -0.95, 0.31);
	    PDF_lineto(myPDF, -0.58, -0.81);
	    PDF_lineto(myPDF, +0.58, -0.81);
	    PDF_lineto(myPDF, +0.95, 0.31);
	    PDF_closepath_fill_stroke(myPDF);
	    break;

/* 15 + (0..15): circles with varying parts of'em filled. The added
 * number is a bit-pattern of the 4 quadrants: 1 signals a quadrant
 * filled */
	case 15+0:
	    PDF_moveto(myPDF, 0, 0);
	    PDF_lineto(myPDF, 0, 1);
	    PDF_arc(myPDF, 0, 0, 1, 90, 360+90);
	    PDF_closepath_stroke(myPDF);
	    break;

/* Generalize common code into a macro... */
#define CIRCLE_SINGLE_PIESLICE(x, y, angle1, angle2)		\
	    PDF_moveto(myPDF, 0, 0);				\
	    PDF_lineto(myPDF, (x), (y));			\
	    PDF_arc(myPDF, 0, 0, 1, (angle1), (angle2));	\
	    PDF_lineto(myPDF, 0, 0);				\
	    PDF_closepath(myPDF);				\
	    PDF_fill_stroke(myPDF);				\
	    PDF_arc(myPDF, 0, 0, 1, (angle2), (angle1) + 360);	\
	    PDF_stroke(myPDF);					\
	    break;

#define CIRCLE_SINGLE_QUADRANT(x, y, angle)			\
	    CIRCLE_SINGLE_PIESLICE(x, y, angle, angle+90);
	case 15+1:
	    CIRCLE_SINGLE_QUADRANT(1, 0, 0);
	case 15+2:
	    CIRCLE_SINGLE_QUADRANT(0, 1, 90);
	case 15+4:
	    CIRCLE_SINGLE_QUADRANT(-1, 0, 180);
	case 15+8:
	    CIRCLE_SINGLE_QUADRANT(0, -1, 270);
#undef CIRCLE_SINGLE_QUADRANT

#define CIRCLE_TWO_NEIGHBOR_QUADRANTS(x, y, angle)		\
	    CIRCLE_SINGLE_PIESLICE(x, y, angle, angle+180)
	case 15+3:
	    CIRCLE_TWO_NEIGHBOR_QUADRANTS(1, 0, 0);
	case 15+6:
	    CIRCLE_TWO_NEIGHBOR_QUADRANTS(0, 1, 90);
	case 15+12:
	    CIRCLE_TWO_NEIGHBOR_QUADRANTS(-1, 0, 180);
	case 15+9:
	    CIRCLE_TWO_NEIGHBOR_QUADRANTS(0, -1, 270);
#undef CIRCLE_TWO_NEIGHBOR_QUADRANTS

#define CIRCLE_TWO_OPPOSING_QUADRANTS(x, y, angle)		\
	    PDF_moveto(myPDF, 0, 0);				\
	    PDF_lineto(myPDF, x, y);				\
	    PDF_arc(myPDF, 0, 0, 1, angle, angle + 90);		\
	    PDF_lineto(myPDF, 0, 0);				\
	    PDF_fill_stroke(myPDF);				\
	    PDF_moveto(myPDF, 0, 0);				\
	    PDF_lineto(myPDF, -x, -y);				\
	    PDF_arc(myPDF, 0, 0, 1, angle + 180, angle + 270);	\
	    PDF_lineto(myPDF, 0, 0);				\
	    PDF_fill_stroke(myPDF);				\
	    PDF_arc(myPDF, 0, 0, 1, angle + 90, angle + 360);	\
	    PDF_stroke(myPDF);					\
	    break;
	case 15+5:
	    CIRCLE_TWO_OPPOSING_QUADRANTS(1, 0, 0);
	case 15+10:
	    CIRCLE_TWO_OPPOSING_QUADRANTS(0, 1, 90);
#undef CIRCLE_TWO_OPPOSING_QUADRANTS

#define CIRCLE_THREE_QUADRANTS(x, y, angle)			\
	    CIRCLE_SINGLE_PIESLICE(x, y, angle, angle+270)
	case 15+7:
	    CIRCLE_THREE_QUADRANTS(1, 0, 0);
	case 15+14:
	    CIRCLE_THREE_QUADRANTS(0, 1, 90);
	case 15+13:
	    CIRCLE_THREE_QUADRANTS(-1, 0, 180);
	case 15+11:
	    CIRCLE_THREE_QUADRANTS(0, -1, 270);
#undef CIRCLE_THREE_QUADRANTS
#undef CIRCLE_SINGLE_PIESLICE

	case 15+15:
	    PDF_circle(myPDF, 0, 0, 1);
	    PDF_closepath_fill_stroke(myPDF);
	    break;


/*************************************************************************/
/* 31 + (0..15): squares with different quadrants of them filled in. */
/*************************************************************************/
/*************************************************************************/
/* 47 + (0..15): diamonds with filled quadrants as given by bit pattern  */
/*   Diamonds are drawn as squares rotated by 45 degrees, so can use
 * fall-through from diamond to squares, and re-use some macros. */
/*************************************************************************/
	case 47+0:
	    PDF_rotate(myPDF, 45);
	    /* FALLTHROUGH */
	case 31+0:
	    PDF_moveto(myPDF, 0, 0);
	    PDF_lineto(myPDF, 0, 1);
	    PDF_lineto(myPDF, -1, 1);
	    PDF_lineto(myPDF, -1, -1);
	    PDF_lineto(myPDF, 1, -1);
	    PDF_lineto(myPDF, 1, 1);
	    PDF_lineto(myPDF, 0, 1);
	    PDF_stroke(myPDF);
	    break;

	case 47+15:
	    PDF_rotate(myPDF, 45);
	    /* FALLTHROUGH */
	case 31+15:
	    PDF_moveto(myPDF, -1, 1);
	    PDF_lineto(myPDF, -1, -1);
	    PDF_lineto(myPDF, 1, -1);
	    PDF_lineto(myPDF, 1, 1);
	    PDF_closepath_fill_stroke(myPDF);
	    break;

/* macros defining shapes of the partly filled symbols. Done by
 * rotating the starting point (x0, y0) by 90 degrees or 45 degrees
 * (with length adjustment).  The rotations can be done without
 * trigonometric function calls, since their values are known:
 * cos(90)=0, sin(90)=1, cos(45)=sin(45)=1/sqrt(2).  A good compiler
 * should be able to optimize away all the local variables and
 * loops...  */

#define SQUARE_SINGLE_PIESLICE(x0, y0, quadrants)			\
	    {								\
		int quadrant = 0;					\
		int x= x0, y=y0;					\
		PDF_moveto(myPDF, 0, 0);				\
		PDF_lineto(myPDF, x, y);				\
		/* poor man's rotation by 45 and 90 degrees around the	\
		 * square's outline. */					\
		while (quadrant++ < quadrants) {			\
		    int dummy;						\
		    PDF_lineto(myPDF, x-y, x+y);			\
		    dummy = x; x = -y; y = dummy;			\
		}							\
		PDF_lineto(myPDF, x, y);				\
		PDF_closepath_fill_stroke(myPDF);			\
		PDF_moveto(myPDF, x, y);				\
		while (quadrant++ <= 4) {				\
		    int dummy;						\
		    PDF_lineto(myPDF, x-y, x+y);			\
		    dummy = x; x = -y; y = dummy;			\
		}							\
		PDF_lineto(myPDF, x, y);				\
		PDF_stroke(myPDF);					\
	    }								\
	    break;

#define SQUARE_TWO_OPPOSING_QUADRANTS(x0, y0, angle)	\
	    {						\
		int x = x0, y = y0, dummy;		\
		int counter = 0;			\
							\
		while (counter++ < 2) {			\
		    PDF_moveto(myPDF, 0, 0);		\
		    PDF_lineto(myPDF, x, y);		\
		    PDF_lineto(myPDF, x-y, x+y);	\
		    dummy = x; x = -y; y = dummy;	\
		    PDF_lineto(myPDF, x, y);		\
		    PDF_closepath_fill_stroke(myPDF);	\
							\
		    PDF_moveto(myPDF, x, y);		\
		    PDF_lineto(myPDF, x-y, x+y);	\
		    dummy = x; x = -y; y = dummy;	\
		    PDF_lineto(myPDF, x, y);		\
		    PDF_stroke(myPDF);			\
		}					\
		break;					\
	    }

/* Macros for diamonds just prepend the rotation and then call those
 * for squares: */
#define DIAMOND_SINGLE_PIESLICE(x, y, quadrants)	\
	    PDF_rotate(myPDF, 45);			\
	    SQUARE_SINGLE_PIESLICE(x, y, quadrants);
#define DIAMOND_TWO_OPPOSING_QUADRANTS(x, y, angle)	\
	    PDF_rotate(myPDF, 45);			\
	    SQUARE_TWO_OPPOSING_QUADRANTS(x, y, angle);

/* ... and now all the individual cases. The 'angle' arguments' are
 * purely for the sake of easing cut'n'paste with the circle case */
#define SQUARE_SINGLE_QUADRANT(x, y, angle)			\
	    SQUARE_SINGLE_PIESLICE(x, y, 1);
	case 31+1:
	    SQUARE_SINGLE_QUADRANT(1, 0, 0);
	case 31+2:
	    SQUARE_SINGLE_QUADRANT(0, 1, 90);
	case 31+4:
	    SQUARE_SINGLE_QUADRANT(-1, 0, 180);
	case 31+8:
	    SQUARE_SINGLE_QUADRANT(0, -1, 270);
#undef SQUARE_SINGLE_QUADRANT

#define SQUARE_TWO_NEIGHBOR_QUADRANTS(x, y, angle)		\
	    SQUARE_SINGLE_PIESLICE(x, y, 2)
	case 31+3:
	    SQUARE_TWO_NEIGHBOR_QUADRANTS(1, 0, 0);
	case 31+6:
	    SQUARE_TWO_NEIGHBOR_QUADRANTS(0, 1, 90);
	case 31+12:
	    SQUARE_TWO_NEIGHBOR_QUADRANTS(-1, 0, 180);
	case 31+9:
	    SQUARE_TWO_NEIGHBOR_QUADRANTS(0, -1, 270);
#undef SQUARE_TWO_NEIGHBOR_QUADRANTS

	case 31+5:
	    SQUARE_TWO_OPPOSING_QUADRANTS(1, 0, 0);
	case 31+10:
	    SQUARE_TWO_OPPOSING_QUADRANTS(0, 1, 90);

#define SQUARE_THREE_QUADRANTS(x, y, angle)			\
	    SQUARE_SINGLE_PIESLICE(x, y, 3)
	case 31+7:
	    SQUARE_THREE_QUADRANTS(1, 0, 0);
	case 31+14:
	    SQUARE_THREE_QUADRANTS(0, 1, 90);
	case 31+13:
	    SQUARE_THREE_QUADRANTS(-1, 0, 180);
	case 31+11:
	    SQUARE_THREE_QUADRANTS(0, -1, 270);
#undef SQUARE_THREE_QUADRANTS

#define DIAMOND_SINGLE_QUADRANT(x, y, angle)			\
	    DIAMOND_SINGLE_PIESLICE(x, y, 1)
	case 47+1:
	    DIAMOND_SINGLE_QUADRANT(1, 0, 0);
	case 47+2:
	    DIAMOND_SINGLE_QUADRANT(0, 1, 90);
	case 47+4:
	    DIAMOND_SINGLE_QUADRANT(-1, 0, 180);
	case 47+8:
	    DIAMOND_SINGLE_QUADRANT(0, -1, 270);
#undef DIAMOND_SINGLE_QUADRANT

#define DIAMOND_TWO_NEIGHBOR_QUADRANTS(x, y, angle)		\
	    DIAMOND_SINGLE_PIESLICE(x, y, 2)
	case 47+3:
	    DIAMOND_TWO_NEIGHBOR_QUADRANTS(1, 0, 0);
	case 47+6:
	    DIAMOND_TWO_NEIGHBOR_QUADRANTS(0, 1, 90);
	case 47+12:
	    DIAMOND_TWO_NEIGHBOR_QUADRANTS(-1, 0, 180);
	case 47+9:
	    DIAMOND_TWO_NEIGHBOR_QUADRANTS(0, -1, 270);
#undef DIAMOND_TWO_NEIGHBOR_QUADRANTS


	case 47+5:
	    DIAMOND_TWO_OPPOSING_QUADRANTS(1, 0, 0);
	case 47+10:
	    DIAMOND_TWO_OPPOSING_QUADRANTS(0, 1, 90);
#undef DIAMOND_TWO_OPPOSING_QUADRANTS
#undef SQUARE_TWO_OPPOSING_QUADRANTS

#define DIAMOND_THREE_QUADRANTS(x, y, angle)			\
	    DIAMOND_SINGLE_PIESLICE(x, y, 3)
	case 47+7:
	    DIAMOND_THREE_QUADRANTS(1, 0, 0);
	case 47+14:
	    DIAMOND_THREE_QUADRANTS(0, 1, 90);
	case 47+13:
	    DIAMOND_THREE_QUADRANTS(-1, 0, 180);
	case 47+11:
	    DIAMOND_THREE_QUADRANTS(0, -1, 270);
#undef DIAMOND_THREE_QUADRANTS
#undef DIAMOND_SINGLE_PIESLICE
#undef SQUARE_SINGLE_PIESLICE

	default:
	    int_warn(NO_CARET, "PDF: unknown point type number %d", number);
	}
    }

    PDF_restore(myPDF);
    PDF_xLast = x;
    PDF_yLast = y;
}


TERM_PUBLIC int
PDF_justify_text (enum JUSTIFY mode)
{
    PDF_TextJust = mode;
    return (TRUE);
}


TERM_PUBLIC int
PDF_text_angle (int ang)
{
    PDF_TextAngle = ang;
    return (TRUE);
}


TERM_PUBLIC void
PDF_put_text (unsigned int x, unsigned int y, const char *str)
{
    char *alignment = NULL;
    double h = x, v = y;

    PDF_PathClose ();

    /* horizontal justification*/
    switch (PDF_TextJust) {
    case LEFT:
	alignment = "left";
	break;
    case CENTRE:
	alignment = "center";
	break;
    case RIGHT:
	alignment = "right";
	break;
    }

    if (PDF_TextAngle) {
	PDF_save(myPDF);
	PDF_translate(myPDF, h, v);
	PDF_rotate(myPDF, PDF_TextAngle);
	/* vertical justification*/
	PDF_translate(myPDF, 0, -(PDF_fontAscent-PDF_fontDescent)/2);
	PDF_show_boxed(myPDF, str, 0,0, 0, 0, alignment, NULL);
	PDF_restore(myPDF);
    } else {
	/* vertical justification*/
	v -= (PDF_fontAscent - PDF_fontDescent) / 2;
	PDF_show_boxed(myPDF, str, h , v, 0, 0, alignment, NULL);
    }

}


TERM_PUBLIC int
PDF_set_font (const char *font)
{
    /* FIXME: This condition is somehow triggered by enhanced_recursion */
    if (font == PDF_fontNameCur)
	;

    else if (!font || !(*font)) {
	strcpy (PDF_fontNameCur, PDF_fontNameDef);
	PDF_fontSizeCur = PDF_fontSizeDef;
    } else {
	int sep = strcspn(font,",");
	if (sep > 0) {
	    strncpy(PDF_fontNameCur,font,sep);
	    PDF_fontNameCur[sep] = NUL;
	}
	if (font[sep] == ',')
	    sscanf(&(font[sep+1]), "%lf", &PDF_fontSizeCur);
    }

    PDF_PathClose();
    PDF_SetFont();

    term->h_char = PDF_fontAvWidth;
    term->v_char = (PDF_fontAscent + PDF_fontDescent + PDF_fontLeading);

    return (TRUE);
}

TERM_PUBLIC void
PDF_boxfill(int style, unsigned int x1, unsigned int y1,
	    unsigned int width, unsigned int height)
{
    gpiPoint corner[4];

	corner[0].x = x1;        corner[0].y = y1;
	corner[1].x = x1+width;  corner[1].y = y1;
	corner[2].x = x1+width;  corner[2].y = y1+height;
	corner[3].x = x1;        corner[3].y = y1+height;

	corner->style = style;
	PDF_filled_polygon(4, corner);
}

TERM_PUBLIC void
PDF_filled_polygon(int points, gpiPoint* corners)
{
    int i;
    int fillpar = corners->style >> 4;
    int style = corners->style & 0xf;

    PDF_PathClose();
    PDF_save(myPDF);

    switch (style) {
	case FS_EMPTY: /* fill with white */
	    PDF_setgray(myPDF, 1);
	    break;
	case FS_TRANSPARENT_SOLID:
#if !HAVE_OLD_LIBPDF
	    {
		/* FIXME: This attribute will be in effect until the end of   */
		/* the current page. We should explicitly reset it to restore */
		/* opaque fill areas as the default. But when should it be?   */
		char density[18];
		double red   = PDF_current_rgb.r;
		double green = PDF_current_rgb.g;
		double blue  = PDF_current_rgb.b;
		sprintf(density,"opacityfill=%4.2f", (double)fillpar*0.01);
		i = PDF_create_gstate(myPDF, density);
		PDF_set_gstate(myPDF, i);
		if (PDF_monochrome)
		    PDF_setgray_fill(myPDF, PDF_current_gray);
		else
		    PDF_setrgbcolor_fill(myPDF, red, green, blue);
		break;
	    }
#endif
	case FS_SOLID:
	    {
		double fact = (double)fillpar * 0.01;
		double _fact = (double)(100-fillpar) * 0.01;
		double red   = PDF_current_rgb.r * fact + _fact;
		double green = PDF_current_rgb.g * fact + _fact;
		double blue  = PDF_current_rgb.b * fact + _fact;
		if (PDF_monochrome)
		    PDF_setgray_fill(myPDF, PDF_current_gray);
		else
		    PDF_setrgbcolor_fill(myPDF, red, green, blue);
	    }
	    break;

#if !HAVE_OLD_LIBPDF
	case FS_PATTERN:
	    fillpar = fillpar % (PDF_patterns + 1) /* 0 == white */;
	    /* Fill in solid background before drawing pattern */
	    /* NOTE:  kpdf/xpdf would accept this as part of the pattern definition */
	    /*        but acroread does not. So for compatibility we do the fill in */
	    /*        a separate step, despite its inefficiency.                    */
	    if (fillpar != 0) {
		PDF_setcolor(myPDF, "fill", "rgb", 1, 1, 1, 0 /* unused */);
		PDF_moveto(myPDF, corners[0].x, corners[0].y);
		for (i=1; i<points; i++)
		    PDF_lineto(myPDF, corners[i].x, corners[i].y);
		PDF_lineto(myPDF, corners[0].x, corners[0].y);
		PDF_fill(myPDF);
		PDF_restore(myPDF);
		PDF_save(myPDF);
	    }
	    /* NOTE: Fall through to the actual pattern code */
	case FS_TRANSPARENT_PATTERN:
	    fillpar = fillpar % (PDF_patterns + 1) /* 0 == white */;
	    switch (fillpar) {
		case 0:
		    /* fill with white */
		    PDF_setcolor(myPDF, "fill", "rgb", 1, 1, 1, 0 /* unused */);
		    break;
		default:
		    PDF_setcolor(myPDF, "fill", "pattern", PDF_patternHandles[fillpar - 1], 0, 0, 0);
	    }
	    break;
#endif

	default:
	    break;
    }

    PDF_moveto(myPDF, corners[0].x, corners[0].y);
    for (i=1; i<points; i++)
	PDF_lineto(myPDF, corners[i].x, corners[i].y);
    PDF_lineto(myPDF, corners[0].x, corners[0].y);
    PDF_fill(myPDF);
    PDF_restore(myPDF);
}

TERM_PUBLIC int
PDF_make_palette(t_sm_palette *palette)
{
    if (palette == NULL) {
	/* pdf can do continuous colors */
	return 0;
    }

    return 0;
}

TERM_PUBLIC void
PDF_set_color(t_colorspec *colorspec)
{
    if (colorspec->type == TC_LT) {
	unsigned int irgb = pm3d_color_names_tbl[ 1 + PDF_Pen_RealID(colorspec->lt) ].value;
	PDF_current_rgb.r = (double)((irgb >> 16) & 0xff) / 255.;
	PDF_current_rgb.g = (double)((irgb >>  8) & 0xff) / 255.;
	PDF_current_rgb.b = (double)((irgb      ) & 0xff) / 255.;
	PDF_current_gray = 0.0; /* monochrome mode only */
    } else if (colorspec->type == TC_FRAC) {
	rgb1maxcolors_from_gray( colorspec->value, &PDF_current_rgb);
	PDF_current_gray = colorspec->value; /* monochrome mode only */
    } else if (colorspec->type == TC_RGB) {
	PDF_current_rgb.r = (double)((colorspec->lt >> 16 ) & 255) / 255.;
	PDF_current_rgb.g = (double)((colorspec->lt >> 8 ) & 255) / 255.;
	PDF_current_rgb.b = (double)(colorspec->lt & 255) / 255.;
    } else
	return;

    /* make sure that the path is stroked with the current color
     * before changing the color */
    PDF_PathClose();

    if (PDF_monochrome && colorspec->type != TC_RGB)
	PDF_setgray(myPDF, PDF_current_gray);  /* FIXME - Should this be NTSC(current_rgb)? */
    else
	PDF_setrgbcolor(myPDF, PDF_current_rgb.r, PDF_current_rgb.g, PDF_current_rgb.b);

    /* mark linetype invalid so that the color will be
     * set when PDF_linetype() is called next */
    PDF_LineType = LT_UNDEFINED;
}

TERM_PUBLIC void
PDF_previous_palette()
{
}
 
TERM_PUBLIC void
PDF_image (unsigned int M, unsigned int N, coordval * image, gpiPoint * corner, t_imagecolor color_mode)
{
    unsigned char *pixel;
    float xscale, yscale;
    int i, im;

    /* Allocate memory to hold a copy of the entire image in raw RGB format */
    unsigned char *rawrgb = gp_alloc( M*N*3, "Raw RGB image");

    /* Convert the input image into raw RGB 24-bit color representation */
    if (color_mode == IC_RGB) {
	for (i=0, pixel=rawrgb; i<N*M*3;) {
	    rgb_color rgb1;
	    rgb255_color rgb255;
	    rgb1.r = image[i++];
	    rgb1.g = image[i++];
	    rgb1.b = image[i++];
	    rgb255_from_rgb1( rgb1, &rgb255 );
	    *pixel++ = rgb255.r;
	    *pixel++ = rgb255.g;
	    *pixel++ = rgb255.b;
	}
    } else {
        for (i=0, pixel=rawrgb; i< N*M; i++) {
	    if (isnan(image[i])) {
		/* Transparent would be better! */
		*pixel++ = 255;
		*pixel++ = 255;
		*pixel++ = 255;
	    } else {
		rgb255_color rgb;
		rgb255maxcolors_from_gray(image[i], &rgb);
		*pixel++ = rgb.r;
		*pixel++ = rgb.g;
		*pixel++ = rgb.b;
	    }
	}
    }
      
    /* Describe this image to PDF library */
    im = PDF_open_image( myPDF, "raw", "memory", (char *)rawrgb,
			 (long)(M*N*3), (int)M, (int)N,
			 3, 8,				/* 3 colors, 8 bits each */
			 "");

    /* Clip to bounding box requested */
	PDF_save(myPDF);
	PDF_moveto(myPDF, corner[2].x, corner[2].y);
	PDF_lineto(myPDF, corner[2].x, corner[3].y);
	PDF_lineto(myPDF, corner[3].x, corner[3].y);
	PDF_lineto(myPDF, corner[3].x, corner[2].y);
	PDF_closepath(myPDF);
	PDF_clip(myPDF);

/* Scale and copy into the main PDF image */
	xscale = fabs((float)corner[1].x - (float)corner[0].x) / (float)M;
	yscale = fabs((float)corner[1].y - (float)corner[0].y) / (float)N;
	PDF_translate(myPDF, corner[0].x, corner[0].y);
	PDF_scale(myPDF, xscale, yscale);
	PDF_translate(myPDF, 0, -(float)N);
	PDF_place_image(myPDF, im, 0.0, 0.0, 1.0 );
	PDF_restore(myPDF);

    /* Clean up */
	PDF_close_image(myPDF, im);
	free(rawrgb);

}

/*
 * Ethan A Merritt November 2003
 *	- support for enhanced text mode
 * BUGS:
 *	- The baseline is not consistent if font size changes within a string.
 *	- Placement of overprinted characters is not correct.
 *	- libpdf exits if the requested font is not recognized.
 *	- I implement text-rotation by hand, but it may be possible to use
 *	  a gsave/translate/rotate/.../grestore sequence instead.
 */

static TBOOLEAN ENHpdf_opened_string;

/* used in determining height of processed text */
static float ENHpdf_base;

/* use these so that we don't over-write the current font settings in pdf_state */
static double  ENHpdf_fontsize;
static char   *ENHpdf_font;

/* A global flag that tells us this run is just to determine text size */
static TBOOLEAN ENHpdf_sizeonly = FALSE;

static TBOOLEAN ENHpdf_show = TRUE;
static int ENHpdf_overprint = 0;
static TBOOLEAN ENHpdf_widthflag = FALSE;
static unsigned int ENHpdf_xsave, ENHpdf_ysave;

/* Start a new string fragment */
TERM_PUBLIC void
ENHPDF_OPEN(
    char *fontname,
    double fontsize, double base,
    TBOOLEAN widthflag, TBOOLEAN showflag,
    int overprint)
{
    /* If the overprint code requests a save or request, that's all we do */
    if (overprint == 3) {
	ENHpdf_xsave = PDF_xLast;
	ENHpdf_ysave = PDF_yLast;
	return;
    } else if (overprint == 4) {
	PDF_move(ENHpdf_xsave, ENHpdf_ysave);
	return;
    }

    if (!ENHpdf_opened_string) {
	ENHpdf_opened_string = TRUE;
	enhanced_cur_text = &enhanced_text[0];
	ENHpdf_font = fontname;
	ENHpdf_fontsize = fontsize;
	ENHpdf_base = base * PDF_RESOLUTION;
	ENHpdf_show = showflag;
	ENHpdf_overprint = overprint;
	ENHpdf_widthflag = widthflag;
    }
}

/* Write a string fragment and update the current position */
TERM_PUBLIC void
ENHPDF_FLUSH()
{
    int x, y;
    float stringlength;

	if (ENHpdf_opened_string) {
	    ENHpdf_opened_string = FALSE;
	    *enhanced_cur_text = '\0';
	    x = PDF_xLast;
	    y = PDF_yLast;
	    x -= sin((double)PDF_TextAngle * M_PI_2/90.) * ENHpdf_base;
	    y += cos((double)PDF_TextAngle * M_PI_2/90.) * ENHpdf_base;
	    x += sin((double)PDF_TextAngle * M_PI_2/90.) * (double)PDF_fontAvWidth/2.;
	    y -= cos((double)PDF_TextAngle * M_PI_2/90.) * (double)PDF_fontAvWidth/2.;

	    /* Select current font for enhanced text fragment, then restore context */
	    if (1) {
		char save_fontname[MAX_ID_LEN + 1];
		double save_fontsize = PDF_fontSizeCur;
		    strcpy(save_fontname,PDF_fontNameCur);
		    PDF_fontSizeCur = ENHpdf_fontsize / PDF_fontscale;
		    PDF_set_font(ENHpdf_font);
		    strcpy(PDF_fontNameCur,save_fontname);
		    PDF_fontSizeCur = save_fontsize;
	    }

	    /* Find length of string in current font */
	    stringlength = PDF_stringwidth(myPDF, enhanced_text,
		PDF_currentFontHandle, ENHpdf_fontsize);
	    stringlength *= PDF_RESOLUTION;

	    if (ENHpdf_show && !ENHpdf_sizeonly) {
		if (PDF_TextAngle == 0 ) {
		    /* PDF_show(myPDF, enhanced_text); */
		    PDF_show_boxed(myPDF, enhanced_text, x, y, 0, 0, "left", NULL);
		} else {
		    PDF_save(myPDF);
		    PDF_translate(myPDF, x, y);
		    PDF_rotate(myPDF, PDF_TextAngle);
		    /* vertical justification*/
		    PDF_translate(myPDF, 0, -(PDF_fontAscent-PDF_fontDescent)/2);
		    PDF_show_boxed(myPDF, enhanced_text, 0, 0, 0, 0, "left", NULL);
		    PDF_restore(myPDF);
		}
	    }
	    if (ENHpdf_overprint == 1) {
		PDF_xLast += stringlength * cos((double)PDF_TextAngle * M_PI_2/90.) / 2.;
		PDF_yLast += stringlength * sin((double)PDF_TextAngle * M_PI_2/90.);
	    } else if (ENHpdf_widthflag) {
		PDF_xLast += stringlength * cos((double)PDF_TextAngle * M_PI_2/90.);
		PDF_yLast += stringlength * sin((double)PDF_TextAngle * M_PI_2/90.);
	    }
	}
}

TERM_PUBLIC void
ENHPDF_put_text(unsigned int x, unsigned int y, const char *str)
{
    char *original_string = (char *)str;

    if (ignore_enhanced_text) {
	PDF_put_text(x,y,str);
	return;
    }

    if (!str || !strlen(str))
	return;

    /* if there are no magic characters, we should just be able
     * punt the string to PDF_put_text()
     */
    if (!strpbrk(str, "{}^_@&~")) {
	/* do something to ensure default font is selected */
	PDF_put_text(x,y,str);
	return;
    }

    PDF_move(x, y);
    PDF_PathClose();
    PDF_save(myPDF);

    /* FIXME - Is this the way to do it?????
    if (PDF_TextAngle != 0)
	ENHPDF_DEBUG(("currentpoint gsave translate %d rotate 0 0 moveto\n", PDF_TextAngle));
     */

    /* set up the global variables needed by enhanced_recursion() */
    enhanced_fontscale = PDF_fontscale;
    strncpy(enhanced_escape_format,"%c",sizeof(enhanced_escape_format));

    ENHpdf_opened_string = FALSE;

    /* EAM - Software text justification requires two passes */
    if (PDF_TextJust == RIGHT || PDF_TextJust == CENTRE)
	ENHpdf_sizeonly = TRUE;

    /* Set the recursion going. We say to keep going until a
     * closing brace, but we don't really expect to find one.
     * If the return value is not the nul-terminator of the
     * string, that can only mean that we did find an unmatched
     * closing brace in the string. We increment past it (else
     * we get stuck in an infinite loop) and try again.
     */
    while (*(str = enhanced_recursion((char *)str, TRUE,
			PDF_fontNameCur, PDF_fontSizeCur * PDF_fontscale,
			0.0, TRUE, TRUE, 0))) {
	(term->enhanced_flush)();

	/* I think we can only get here if *str == '}' */
	    enh_err_check(str);

	if (!*++str)
	    break; /* end of string */

	/* else carry on and process the rest of the string */
    }

    PDF_restore(myPDF);

    /* We can do text justification by running the entire top level string */
    /* through 2 times, with the ENHpdf_sizeonly flag set the first time.   */
    /* After seeing where the final position is, we then offset the start  */
    /* point accordingly and run it again.                                 */
    if (PDF_TextJust == RIGHT || PDF_TextJust == CENTRE) {
	int justification = PDF_TextJust;
	int x_offset = PDF_xLast - x;
	int y_offset = 0;

	if (PDF_TextAngle != 0)
	    y_offset = PDF_yLast - y;
	PDF_TextJust = LEFT;
	ENHpdf_sizeonly = FALSE;

	if (justification == RIGHT) {
	    ENHPDF_put_text(x - x_offset, y - y_offset, original_string);
	} else if (justification == CENTRE) {
	    ENHPDF_put_text(x - x_offset/2, y - y_offset/2, original_string);
	}
	PDF_TextJust = justification;
    }

}

#endif /* TERM_BODY */

#ifdef TERM_TABLE
TERM_TABLE_START (pdf_driver)
    "pdf", "PDF (Portable Document File) file driver",
    0 /* xmax */ , 0 /* ymax */ , 0 /* vchar */ , 0 /* hchar */ ,
    0 /* vtic */ , 0 /* htic */ ,
    PDF_options, PDF_init, PDF_reset, PDF_text, null_scale, PDF_graphics,
    PDF_move, PDF_vector, PDF_linetype, PDF_put_text, PDF_text_angle,
    PDF_justify_text, PDF_point, do_arrow, PDF_set_font, do_pointsize,
    TERM_BINARY|TERM_CAN_DASH|TERM_LINEWIDTH|TERM_FONTSCALE,
    0 /* suspend */, 0 /* resume */ , PDF_boxfill, PDF_linewidth
#   ifdef USE_MOUSE
   , 0, 0, 0, 0, 0 /* no mouse support for pdf */
#   endif
   , PDF_make_palette,
   PDF_previous_palette,
   PDF_set_color,
   PDF_filled_polygon
   , PDF_image
   , ENHPDF_OPEN, ENHPDF_FLUSH, do_enh_writec
TERM_TABLE_END (pdf_driver)
#undef LAST_TERM
#define LAST_TERM pdf_driver
#endif /* TERM_TABLE */

#endif /* TERM_PROTO_ONLY */

#ifdef TERM_HELP
START_HELP(pdf)
"1 pdf",
"?commands set terminal pdf",
"?set terminal pdf",
"?set term pdf",
"?terminal pdf",
"?term pdf",
"?pdf",
" [DEPRECATED] This terminal uses the non-free library PDFlib (GmbH Munchen)"
" to produce files in Portable Document Format. Unless you have a commercial",
" license for PDFlib and need some special feature it provides you would do",
" better to use the cairo pdf terminal instead.  Gnuplot can also export PDF",
" files from wxt or qt interactive terminal sessions.",
"",
" Syntax:",
"       set terminal pdf {monochrome|color|colour}",
"                        {{no}enhanced}",
"                        {fname \"<font>\"} {fsize <fontsize>}",
"                        {font \"<fontname>{,<fontsize>}\"} {fontscale <scale>}",
"                        {linewidth <lw>} {rounded|butt}",
"                        {dl <dashlength>}}",
"                        {size <XX>{unit},<YY>{unit}}",
"",
" The default is to use a different color for each line type. Selecting",
" `monochome` will use black for all linetypes, Even in in mono mode",
" you can still use explicit colors for filled areas or linestyles.",
"",
" where <font> is the name of the default font to use (default Helvetica)",
" and <fontsize> is the font size (in points, default 12).",
" For help on which fonts are available or how to install new ones, please",
" see the documentation for your local installation of pdflib.",
"",
" The `enhanced` option enables enhanced text processing features",
" (subscripts, superscripts and mixed fonts). See `enhanced`.",
"",
" The width of all lines in the plot can be increased by the factor <n>",
" specified in `linewidth`. Similarly `dashlength` is a multiplier for the",
" default dash spacing.",
"",
" `rounded` sets line caps and line joins to be rounded; `butt` is the",
" default, butt caps and mitered joins.",
"",
" The default size for PDF output is 5 inches by 3 inches. The `size` option",
" changes this to whatever the user requests. By default the X and Y sizes",
" are taken to be in inches, but other units are possible (currently only cm).",
""
END_HELP(pdf)
#endif
